Submarine boat.



No. 706,546I."` Patented Aug; i2, |902. J. `P. H ULLAND. v

supllAnlnE son.

` (Applicston 81nd Ang. 7, 1001.) (llo Model.) 2 Sheets-Shest 2.

- v'wlTNEs'sss= 4 v Z p INVENTOR 'l v v I r M ATTORNEY UNITED STATES` PATENT OFFICE.

.IOIIN P. HOLLAND, OF NEIVARK, JERSEY.

SUBMARINE BOAT.

SPECIFICATION forming part of Letters APatent N o. 706,561, dated August 12, 1902. Application iiled August '7, 1901. Serial No. '71,132'.` (No model.)

T0 all whom t may con/cern,.-l

Be it known that I, JOHN P. HOLLAND, a

citizen of the United States, residing in Newark, Essex county, New Jersey, have invented certain new and useful Improvements in and Relating to Submarine Boats, of which the fol-V lowing is a specification.

This invention relates to the class of boats chiefly employed for war purposes whichare adapted to dive and operate submerged, and in this class of boats or vessels it is desirable that the boat shall be capable of rising quickly and momentarily to the surface for purposes of observation and as quickly sinking again out of sight, these movements being independent of the normal diving operation of the boat.

The object of the present invention is toV provide a submarine or submergible boat or vessel with means to enable it to attain the above object, and these means will now be described, with reference to the accompanying drawings, which illustrate an embodiment of the invention.`

In the drawings, Figure 1 is a side elevation of a submarine boat partly broken away to show the devices for the purpose stated. The other internal mechanisms of the boat are omitted, as forming no part of the present invention. Fig. 2 is an enlarged sectional view of the ballast-tank and its appurtenances, the plane of the section being vertical and axial 5 and Fig. 3 is a horizontal section of same in the plane indicated by the line x3 in Fig. 2.

In the drawings, 1 ,designates the hull or body of a submarine boat provided with my invention. 2 is the conning-tower ofthe boat, 3 the rudders for horizontal steering, and 4 the propeller. tial part of the invention, although they are necessary parts of such a boat.

The water-line when the boat is in conditionfor surface` runningis indicated by the line nu. Vhen it is awash or prepared for diving, the water-line will be at y.

z designates avertical line through the ceuter of buoyancy'of the boat when it is submerged.

A tank 5, having a capacity of about onehalf of one per cent. of the boats total displacement, is set in the boat under its center These features form no essen of buoyancy-that is, in the line a--as shown.

This tank has communication with the water of dotation through au opening 6, controlled by a valve 7, which opens outwardly and which is held up to its seat by a suitable spring Sabout the stem 9 of the valve. This spring is merely to overcome the weight of the parts, as the pressure of the water will ordinarily hold the valve to its scat. The valve 7 may be operated for opening it to admit water to the tank by means of a rockshaft 10, which rocks in bearings in the wall of the tank and has two arms 11 and 12, one of which is coupled by a link 13 tothe stem of the valve. The other arm outside of the tank is coupled to an operating-rod 14E, which extends up to a point above Ywhere ready access can be had to it from the interior of the boat for operating the valve. Any means may be employed for .operating the rod 14.

vAs shown in Fig. 2, a leverlgis utilized.

In the boat isian 'air-tank 16, containing air at high pressuresay up to two thousand pounds per square inch-and this tank supplies with air' at a lower pressure a servicetank 17 througha pipe 18, in which is a stopvalve or cut-oit `19 and a reducing-valve 20. The service-tank 17 supplies air tothe tank 5 through a pipe21, provided with a readilyaccessible stop-valve 22, and an'air-discharge pipe 23 opens into the interior of the boat, being controlled by a stop-valve21. A The airservicetank 17 hasa relief-valve 25;

In order to cause the conning-tower of the boatto Arise` above the surface of the water and to disappear again quickly, so as not to attract notice, `the Water is forced rapidly from the special tank 5 while the boat is submerged, thus reducing its weight by one-half of one per cent. The boat will then rise, and as soon as the conning-tower reaches the surface the air is discharged from the said tank at the valve 24 and the water admitted to the tank at the valve 7. The upwardmovelnent of the boat will carrythe greater part of the towel' above-the surface of the water; but the increased total `weight due-.torestoring the water to the tank and the increase in Weight due to the emergence of the whole of the tower instead of only about one-third of it, which normally represents reserve buoyancy, will cause the boat to sink and the tower to IOO disappear quickly. The boat being in motion slowly, this maneuver can be assisted by the diving-rudders; but the apparatus described may be operated independently of the diving mechanism.

.Having thus ,described my invention, I claim 1. A submarine boat having the usual water-ballast tanks, an independent special tank to containa predetermined quantity of Water, a valve controlling the admission of water thereto from the outside, manually-operable means for opening-said valve from the interior of the boat, a manually-operable stopvalve controlling communication between the top of said tank and the interior of the boat, a tank containing compressed air, a pipe connecting said tank with the said special tank, and a manually-operable stop-Valve controlling said pipe.

2. A submarine boat having the usual water-ballast tanks, an independent water-ballast tank of fixed and predetermined capacity situated below the center of buoyancy of the boat when submerged, manually-controlled means of rapidly discharging the water from said tank to permit the boat to rise to the surface, and manually controlled and operable means for rapidly refilling said tank as soon as the conning-tower reaches the surface, substantially as and for the purpose set forth.

In witness whereof I have hereunto signed my name, this 30th day of July, 1901, in the presence of two subscribing witnesses.

' JOHN P. HOLLAND.

Witnesses:

PETER' A. Ross, K. M. OAPLINGER. 

